Refactoring company-go
Refactoring company-go

- Add go-mode to dependencies because this package uses its functions
- Load go-mode and company not only compile time because this package uses its functions.

nsf/gocode,thousandhigh/gocode,nsf/gocode,beni55/gocode,mdempsky/gocode,nsf/gocode,mdempsky/gocode,nsf/gocode,thousandhigh/gocode,beni55/gocode,beni55/gocode,mdempsky/gocode,thousandhigh/gocode,beni55/gocode,thousandhigh/gocode